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CVE-2026-83618 (GCVE-0-2026-83618)

Vulnerability from cvelistv5 – Published: 2026-09-01 14:49 – Updated: 2026-09-04 01:59
VLAI
Title
xmldom: requireWellFormed DocType publicId/systemId validation is bypassable via an embedded line terminator
Summary
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.10 until 0.9.12, the requireWellFormed: true serializer validates DocumentType.publicId and DocumentType.systemId with PubidLiteral_match and SystemLiteral_match expressions produced by reg() in lib/grammar.js, which inherit the multiline flag. A complete valid literal on the first line can therefore satisfy the matcher while U+000A, U+000D, U+2028, or U+2029 and breakout markup remain in the emitted <!DOCTYPE ...> declaration. This bypasses the strict-serialization mitigation for the earlier DocumentType injection advisory; creation and direct property assignment remain unvalidated by design. This issue is fixed in @xmldom/xmldom version 0.9.12.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 01:58 UTC
CWE
  • CWE-91 - XML Injection (aka Blind XPath Injection)
  • CWE-625 - Permissive Regular Expression
Assigner
References
Impacted products
Vendor Product Version CPE status
xmldom xmldom Affected: >= 0.9.10, < 0.9.12
guessed Create a notification for this product.
@xmldom xmldom Affected: >= 0.9.10, < 0.9.12
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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